(the choices for the first one is 90 or 180)

(the choices for the second one is [1 and 2] [1 and 4] [2 and 3] [3 and 4] )

the choices for the third one is 1 or 4

The first one is 180 because the angles of a triangle add up to 180

angles 1 and 4

And finally, the last one is 1

i used to know how to do this in 7th but i forget easily

step-by-step explanation:

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5